A stunning example of an iridescent ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The matrix measures 50 mm (1.96 inches) tall and the ammonite measures 15 mm, which is small for this species making it a juvenile. The shell sits in the original limestone matrix in which it was found that has been shaped and has a cut-flat base for display. The ammonite is well preserved and has been prepared out of the rock to reveal the shell. The shell displays some stunning iridescence with red and copper tones dominating and changing as the viewing angle shifts.
These fossils are highly sought after and very hard to find, especially complete like this. They are preserved in the same way as the famous Canadian "Ammolite" ammonites that are turned into valuable gemstones. The fossil weighs 80 grams.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.